Infrared method for improving coal bed gas extraction rate

A technology for coal seam gas and extraction rate, which is applied in the field of infrared improvement of coal seam gas extraction rate, can solve the problems of complicated construction process, influence safety production, low extraction efficiency, etc. The effect of shortening the extraction time

Inactive Publication Date: 2015-04-01
HENAN POLYTECHNIC UNIV
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these technologies generally have problems such as large amount of work, complicated construction technology, and low drainage efficiency.
In addition, although hydraulic measures can realize coal seam pressure relief, stress concentration will occur in some places, which will affect safe production

Method used

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  • Infrared method for improving coal bed gas extraction rate
  • Infrared method for improving coal bed gas extraction rate
  • Infrared method for improving coal bed gas extraction rate

Examples

Experimental program
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Effect test

Embodiment 1

[0017] Depend on Figure 1-Figure 3 A method for improving coal seam gas extraction rate by infrared as shown includes the following steps: (1) measuring the physical and chemical properties of coal seam 2 in the laboratory, using laboratory instruments such as a permeability tester, a specific surface area porosity tester, a heat conduction The coefficient tester and industrial analyzer measure the permeability, porosity, thermal conductivity, water content, etc. of the coal seam 2, and provide experimental basis for the preliminary design of the infrared parameter scheme, and then preliminarily design several sets of infrared parameter schemes. The infrared parameter scheme includes infrared light wave (2) Excavate the bottom extraction roadway 7 along the coal seam 2, that is, excavate the bottom suction roadway 7 along the strike direction under the coal seam 2, and then drill the reconstruction hole 3 from the bottom suction roadway 7 to the coal seam 2, and in the reconst...

Embodiment 2

[0020] Depend on figure 1 , Figure 4 and Figure 5 A method for improving coal seam gas extraction rate by infrared is shown, (1) The physical and chemical properties of the coal seam 2 are measured in the laboratory, using laboratory instruments such as a permeability tester, a specific surface area porosity tester, a thermal conductivity tester and Industrial analyzers, etc. measure the permeability, porosity, thermal conductivity, moisture content, etc. of coal seam 2 to provide experimental basis for the preliminary design of infrared parameter schemes, and then preliminarily design several sets of infrared parameter schemes. The infrared parameter schemes include the frequency and wavelength of infrared light waves , (2) Excavate the top pumping roadway 11 along the coal seam 2, that is, dig out the top pumping roadway 11 along the direction above the coal seam 2, and then drill the reformed hole 3 from the top pumped roadway 11 to the coal seam 2, and make holes on bot...

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Abstract

The invention discloses an infrared method for improving a coal bed gas extraction rate. The infrared method for improving the coal bed gas extraction rate comprises the following steps of (1) measuring coal bed physicochemical properties and primarily designing a plurality of groups of infrared parameter schemes; (2) digging a bottom extraction channel or a top extraction channel along a coal bed, punching a transformation hole from the bottom extraction channel or the top extraction channel to the coal bed and arranging extraction drilling holes in the lateral side of the transformation hole; (3) placing an infrared radiation pipe at a coal bed section of the transformation hole, sealing the transformation hole and the extraction drilling holes, directly connecting the extraction drilling holes to a gas extraction pipeline and connecting an infrared control line of the infrared radiation pipe to an infrared controller; (4) opening the infrared controller and continuously irradiating the coal bed through infrared light waves; (5) selecting an optimal parameter scheme with the extraction amount, the extraction concentration and the extraction rate being served as judgment criterions and adjusting an infrared parameter of an integral extraction area construction unit to be an optimal parameter scheme. The infrared method for improving the coal bed gas extraction rate can increase the coal bed gas desorption volume.

Description

technical field [0001] The invention relates to an infrared method for increasing the gas extraction rate of coal seams, especially for coal seams with high gas content and high residual gas content, the effect is more remarkable. Background technique [0002] Gas is an associated gas product of coal, also known as coal bed methane. It is a kind of self-generated and self-storage or gas reservoir natural gas that occurs in the coal seam and its surrounding rocks. Gas in coal has three occurrence states: adsorption, absorption, and free state. Gas drainage mainly extracts free and partially adsorbed gas in coal seams through pressure relief. However, coal seam gas in my country has the characteristics of microporosity, low permeability, and high adsorption. High gas and low permeability coal seams also increase with the increase of mining depth. Increasing year by year, the amount of gas gushing out is increasing, and the threat of gas explosion and gas outburst is becoming ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B43/16
CPCE21B43/24E21B43/006E21F7/00
Inventor 刘晓李锋马耕白万备梁爽韩颖李贤忠
Owner HENAN POLYTECHNIC UNIV
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